Artificial Lung Ventilator Working in the Hyperbaric Chamber

The aim of this article is to identify and interpret the data provided by modern digitally controlled ventilators that provide the greatest help in evaluating respiratory mechanics during mechanical ventilation. In intensive care, respiratory mechanics can be assessed in dynamic conditions (no flow interruption) or static conditions (occlusion techniques) to record compliance and resistance and to monitor pressure, flow, and volume. Real-time visualization of the pressure curve is crucial for monitoring during volume-controlled ventilation, in which pressure is the dependent variable. The system for forced inspiration in hyperbaric chamber was designed, simulated and evaluated. The system is scheduled for animal experiments on anestesied pig and it is based on pressure control ventilation mode. The whole system is controlled by microcontroller which is connected to personal computer. The control system is equipped also with high resolution analog-digital converter with on chip digital lowpass filter, which is used for precise measuring of some physical quantities by means of sensors e.g. oxygen concentration in hyperbaric chamber, temperature and pressure in hyperbaric chamber.